British Species of Caddis-flies. 91 
Genus AcrayLeEa, Curtis. 
Antenne stout, the basal joint scarcely longer than the others. 
Head densely hairy. Ocelli present. Maxillary palpi of the 
males with a short basal joint, the rest long and nearly equal ; in 
the females the joints are nearly equally long, excepting the basal 
which is very short. Labial palpi with two short basal joints; the 
third longer and much dilated, conical or rather, perhaps, spoon- 
shaped, it being concave within. Mesothorax nearly smooth, 
scarcely so broad as the head. Anterior wings very hairy, with 
long fringes, narrow, of nearly equal breadth throughout, the 
costal and dorsal margins straight, the former sloping off rather 
abruptly before the somewhat obtuse apex; the subcostal nervure 
and radius short, uniting before their junction with the costa; 
discoidal cell open (?); the twe branches of the ramus discoidalis 
ending in long apical forks; the upper branch of the superior fork 
of the ramus thyrifer ends in a shorter apical fork ; thus there 
are three apical forks in these wings. Posterior wings narrower 
and shorter than the anterior, less densely hairy, but with very 
long fringes; neuration very similar. Legs short and moderately 
stout; all the thighs considerably dilated; the anterior tibiz not 
spurred ; intermediate tibize with a pair of long and very unequal 
apical spurs, and one short median; posterior tibiz hairy, two 
pairs of long and very unequal spurs. Abdomen moderate. In 
repose the wings are pressed together almost vertically. 
Larva unknown. Dr. Hagen suspects that some singular cases 
found by Bremi may belong to this genus. In these the case of 
the larva is oblong, somewhat widened in the middle, flat, open 
at each end and transparent; the case of the pupa is less trans- 
parent, with an appendage at each corner by which it is fastened 
to water plants. The contained larvz possessed strongly dilated 
forelegs, and did not resemble Hydroptila larve. (For a detailed 
account of these cases, see the Stettin Entomologische Zeitung for 
1864, p. 115.) 
Agruylea may be separated from Hydroptila by the broader 
and more obtuse anterior wings, the undoubted presence of ocelli, 
the form of the terminal joint of the labial palpi, &c. They are 
also less gregarious in their habits. 
I have been unable to detect transverse veins in any of the 
wings; nevertheless [ do not feel certain that they are absent, for 
Kolenati figures and describes the discoidal cell in the anterior 
pair as being closed by a transverse vein, and indicates another, 
uniting this cell to the radius or subcosta. 
